Operation Manual

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4.16 Zero Point Shifts
Mirror/shift contour G121
G121 mirrors and/or shifts the blank and finished part contours. The
contour is mirrored at the X axis and shifted in Z direction. The
workpiece zero point is not affected.
G121 allows you to use the blank and finished part descriptions for
front and rear-face machining.
Parameters
H Type of transformation (default: 0)
 H=0: Contour shift, not mirroring
 H=1: Contour shift, mirroring and reversing the direction of
the contour description
Q Mirroring the Z axis of the coordinate system (default: 0)
 Q=0: Do not mirror
 Q=1: Mirror
Z Shift. Shift coordinate system in Z direction (default: 0)
D Mirror XC/XCR (mirroring and shifting front and rear face
contours) – (default: 0)
 Q=0: Do not mirror/shift
 Q=1: Mirror/shift
 Cylindrical surface contours are mirrored/shifted like
turning contours.
 Auxiliary contours are not mirrored.
 Note: Q=1 mirrors the coordinate system and the
contour; H=1 mirrors only the contour.